Apple has made the installation process for OS X Lion (10.7) slightly different than it was for previous versions of the operating system. Even with the differences, you can still create a clean installation of Lion on an internal drive, a partition, an external drive, or a USB flash drive.
The OS X Mountain Lion installer that you download from the Mac App Store can perform both an upgrade install (the default) and a clean install. A «clean» install means that you start fresh, by erasing all of the data on the target drive.
Apr 17, 2012 · This should take you back to the Lion Recovery Mode screen. Now click Reinstall Mac OS X to begin reinstalling. It will likely ask you for your Apple account details, enter them, and the rest of the on-screen instructions are dead easy to follow.
After starting up from macOS Recovery, follow these steps to install macOS:. Choose Reinstall macOS (or Reinstall OS X) from the Utilities window. Click Continue, then follow the onscreen instructions to choose your disk and begin installation.
Jul 26, 2012 · Some users, however, view a new OS release as an opportunity to perform a clean install. It’s possible to do a clean install of Mountain Lion, but the process takes a little bit of work.
Jul 20, 2011 · Update:This guide was written for OS X Lion in 2011, for a current guide to doing a clean install of OS X Mavericks, please view this updated post.
[Editor’s note: This article is part of our series of articles on installing and upgrading to Lion (OS X 10.7).We also have a complete guide to installing and upgrading to Mountain Lion (OS X 10.8
If you don’t have it yet, get Mountain Lion from the Mac App Store but do not install it yet (or …
Jun 21, 2011 · Choosing a clean install will force the destination drive to lose all existing data. Only do this if you have a backup made and you are comfortable with formatting the Mac hard drive. Carry on for some background on the OS X Lion clean install nonissue. Update: Lion is now available on App Store to download. Yes, you can still perform a clean install with the final release App Store version.
Scroll through the text and click Start Using Mac OS X Lion—or, if you’re using a Mac without a trackpad or Magic Mouse, just click Start Using Mac OS X Lion—and your Mac will finish booting.
A clean install will give you peace of mind. With that cleared up, in this article we will show you how to erase existing data and reinstall a brand new copy of Mountain Lion. Here is a breakdown of the steps involved: Download a copy of Mac OS X Mountain Lion; Make a bootable drive of Mac OS X Mountain Lion with a USB drive
Find out if your Mac can run OS X El Capitan. Back up your Mac. Get OS X El Capitan from the Mac App Store. Double-click Install OS X El Capitan to begin installation.
Oct 04, 2011 · By clean install do you mean an erase and install where you wipe your hard drive and reinstall the os? Assuming this is the case the best way to go about this would be back up the data you want to keep on a disc or your exernal harddrive before you upgrade to lion.